SOLUTION: How many even four-digit numbers can you form from the digits 1, 2, 3, and 5 where no digit is used twice?

Question 255801: How many even four-digit numbers can you form from the digits 1, 2, 3, and 5 where no digit is used twice?
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

Since the formed number has to be even, it must end in 2, so all you need is how many ways are there to arrange the the other three digits -- three ways to select the first one times two ways to select the second one times one way to select the 3rd one. All in all, 6.

John

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